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Investigation of effect of cut fins on carbon dioxide gas cooler performance.

Author(s) : SINGH V., AUTE V., RADERMACHER R.

Type of article: Article

Summary

In fin-and-tube heat exchangers operating at large temperature differences (such as carbon dioxide gas coolers), the heat transfer due to fin conduction between neighboring tubes degrades the heat exchanger performance. In this paper, a validated segment-by-segment heat exchanger model capable of accounting for tube-to-tube conduction in two dimensions, as well as simulating continuous and discontinuous cut fins has been employed to study the effect of cut fins on heat exchanger performance. The effect of two separate configurations of cut fins on heat exchanger performance was studied for 36 test cases, and a heat load gain of up to 12% was shown with cut fins. Additionally, for a target heat load, fin material savings of up to 40% were shown. Further, gains of up to 20% in the inlet quality of an evaporator were shown, considering a 7.2°C evaporating temperature and isenthalpic expansion. Finally, by placing constraints on the length of cuts and maximizing heat load, guidelines for location of cut fins were established.

Details

  • Original title: Investigation of effect of cut fins on carbon dioxide gas cooler performance.
  • Record ID : 30002311
  • Languages: English
  • Source: HVAC&R Research - vol. 16 - n. 4
  • Publication date: 2010/07

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